Force edge split even when angle is zero
I'm not sure you can do it without first applying at least the Triangulate modifier, but it can be easily done in edit mode. (If I interpret things correctly, the Split Angle of the Edge Split modifier is taken as greater than, not greater than or equal to, so you'll have to mark all edges as sharp, and I know of no way to mark edges that are created by a modifier sharp without first applying that modifier).

Method 1

Apply the Triangulate modifier, Tab into edit mode, select everything by pressing A as many times (none, one or two, depending what's selected to begin with) as needed and mark edges sharp (Mesh -> Edges -> Mark Sharp or CtrlE followed by K).

Method 2

Remove both your modifiers, then Tab into edit mode, select everything by pressing A as many times (none, one or two, depending what's selected to begin with) as needed and triangulate (Mesh -> Faces -> Triangulate Faces or CtrlF followed by T), then split the edges (Mesh -> Edges -> Edge Split or CtrlE followed by D).